package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品及对应口味信息
     * @param dishDTO
     */
    @Transactional//事务注解
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表中插入数据
        dishMapper.insert(dish);
        //获取菜品id
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors!= null && flavors.size() > 0){
            //设置口味的菜品id
            flavors.forEach(dishflavor -> {
                dishflavor.setDishId(dishId);
            });

            //向口味表中插入数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询接口
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //select * from dish limit 0,10;
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        //封装分页结果
        return new PageResult(page.getTotal(),page.getResult());

    }

    /**
     * 批量删除菜品接口
     */
    @Transactional//事务注解
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够被删除---是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品 处于起售中，不能被删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能够被删除---是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if (setmealIds!= null && setmealIds.size() > 0) {
            //当前菜品 被套餐关联了，不能被删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
        /*(for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味表中的口味数据
            dishFlavorMapper.deleteByDishId(id);

        }*/
        //根据菜品id批量删除菜品及口味数据
        dishMapper.deleteByIds(ids);
        //根据菜品id批量删除关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品及口味信息
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据菜品id查询菜品信息
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询查询口味信息
        List<DishFlavor> DishFlavors = dishFlavorMapper.getByDishId(id);
        //封装菜品及口味信息
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(DishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品接口及口味信息
     */
    @Transactional//事务注解
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //删除原有的口味信息
        dishFlavorMapper.deleteByDishId(dish.getId());
        //插入新的口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //设置口味的菜品id
            flavors.forEach(dishflavor -> {
                dishflavor.setDishId(dishDTO.getId());
            });
            //插入新的口味信息
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 启用/禁用菜品接口
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //更新菜品状态
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);

    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
